Safety-trap



u.. L Lm O Nw E JA S d. d O M 0 W No. 586,618 Patented July 20,1897.

Witnesses, Q2, @f

Ens co, momLnno., wAsHwmov UNrTEn STATES PATENT OFFICE.

JOSEPH NOLTT, OF BUFFALO, NIV YORK.

SAFETY-TRAP.

SPECIFICATION forming part of Letters Patent No. 586,618, dated July 20, 1897.

Application filed December l0, S96. Serial No. 615,142. (No modelo To @ZZ whom it may concern,.-

Be it known that l, JOSEPH NOLL, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements .in Safety-Traps, of which the following' is a specification.

)ly invention relates to a new and iinproved safety-trap designed to be used in sewer and other pipes and will be fully and clearly hereinafter described and claimed, reference being had to the accompanying drawings, in which Figure l represents a side elevation looking in the direction of the arrow V, Fig. 4. Fig. 2 represents a side elevation looking in the direction of the arrow X, Fig. Il, showing also the open position of the folding jaws by dotted lines. Fig. represents a central sectional elevation of detached portions of two sections of pipe, showing their joint and a side elevation of the trap in position therein. Fig. a represents a top plan view of the device. Fig. 5 is a detached top plan view of the packing-ring. Fig. 6 represents a detached sectional view of the packing-ring on or about line b l), Fig. 5.

My invention is chiefly applicable to sewer or waste pipes, but it Vis perfectly adapted for use in any sanitary device where a positive stop-valve is required to prevent the backward iiow of the water or other liquid or the arising therefrom of noxious gases or other contaminating semiliquid or liquid substances.

Referring to the drawings in detail, my invention consists of the circular supportingring l, folding jaws 2 3, which are substantially cone-shaped in appearance when folded, and hinges 4, by which the folding jaws are pivotally secured to the supporting-ring. Sprin gs 5 are fastened to the folding jaws substantially as shown in the drawings, the outer ends of the said springs pressing against the interior of the pipe, and thus hold the said jaws together with a spring force.

The entire edge of each of the folding jaws is bent at an angle therefrom sufficient to present a broad edge 6, parallel to each other and to the supporting-ring when the vertical sides of the jaws are closed tightly against each other, the horizontal sides against the upper face of the su pporting-ring. A packing-ring 7, formed of rubber or other suitable elastic material, is placed on the edge 6 of each of the jaws.

The general shape and appearance of the packing-ring are shown in Figs. 5 and 6, the edge 6 of the jaws fitting in the groove 8, (shown in Fig. 0,) and thus holding the packing-ring in place on the said jaws. This packing-ring is put on by slipping the upper end or edge GC, (shown by dotted lines in Fig. 1,) for instance, of the folding valve-jaw into the narrow slit or groove 8 of the packingring and then stretching the ring and forcing it over and along the edge 6, extending entirely around the valve-jaw, the elasticity of the material keeping it iirinly in place thereon, as shown.

Four or more portions 9 project at right angles in an upward direction from the supporting-ring, the purpose of which is to separate the pipe-sections from each other at their joint sufficiently to allow free action for the operating of the folding jaws.

It will be observed by reference to Fig. 2 that the hinges are elevated slightly above the su pporting-rin g. Although by this means the jaws bind tightly together at the bottom when closed, they still can be opened, owing to the elastic character of the washer.

It will also be perceived that the jaws are secured to the hinges on the supporting-ring substantially centrally between their sides. By this means the jaws are hinged to the ring at the greatest possible dista-nce from their side edges. But one hinge is required for each jaw. The jaws in opening swing outwardly from the supporting-ring, and in closing the force of the water in the backward or wrong direction presses the side edges of the jaws tightly against each other and the bottom edges tightly against the supporting-ring, and the stronger the pressure the stronger the tendency is to force their respective edges against each other and the supporting-ring.

It will be easily perceived by referring to the drawings that water flowing against the interior of the folding jaws will force them apart, and thus continue uninterrupted on its journey; but upon the flow stopping the folding jaws, being relieved from the interior pressure of the water, will close with a spring force, and pressure or force exerted in the opposite directions will only tend to force them more closely in contact with each other and to the upper face of the supporting-ring, and thus insure, with the aid of the elastic washers, a perfect water and gas tight trap.

This device is also well adapted to be used in water-mains or water-pipes and to be set so as to remain in an open position, so that the water can flow through freely, the construction being such that it can at any time be instantly closed when required to shut off the water in the communicating pipes beyond it.

In manufacturing the device I prefer to stamp the jaw-sections and supporting-ring from suitable metallic sheets. They can, however, be molded or otherwise formed of brass, iron, or other metals, if desired.

I claim as my inventionl. In a safety-trap, the combination with a supporting-ring, adapted to fit between the joint of two pipe-sections, of two folding jaws presenting a substantially cone-shaped appearance when closed and each hinged to the said ring, at a point central between their vertical sides and adapted to be forced closely to each other and backward against the supporting-ring by the backward pressure of the water.

2. A safety-trap, consisting of a supporting-ring, adapted to be mounted in the joint of two pipe-sections, two folding jaws hinged by slightly-raised hinges to said ring, and devices projecting from one side of the said supporting-ring to separate the pipe-sections sufficiently to allow free action for the operating of the raised hinges of the folding jaws.

3. A safety-trap, consisting of a supporting-ring adapted to fit between the joint of two pipe-sections, two folding jaws presenting a substantially cone-shaped appearance when closed, hinged thereto and projecting centrally forward into one of said pipe-sections, springs fastened at one end to said jaws and pressing against the interior of the pipesection at the other end for closing said jaws,

and elastic packing-rings around the edges of each of said jaws, the said jaws opening when pressure is exerted against their interior surface and closing when said pressure is removed, pressure in the opposite direction against their exterior faces, tending to force them more closely together and against the upper side of the supporting-ring, and thus with the aid ofthe elastic packing-rings render the said trap gas and water tight.

4E. A safety-trap, consisting of a supporting-ring, adapted to be secured in the joint of two pipe-sections, two folding jaws presenting a substantially cone-shaped appearance when closed, hinges elevated slightly above the supporting-ring for securing said jaws to said ring, raised portions projecting from one side of the said supporting-ring to separate the pipe-sections sufficiently to allow free action to the said elevated hinges, and an elastic packing-ring fitting the edges of said jaw, so that although the jaws bind tightly together at the bottom they still can be opened owing to the elastic character of the packing-rings.

5. A safety-trap, consisting of a supporting-ring, adapted to fit between the joint of two pipe-sections, two folding jaws presenting a substantially cone-shaped appearance when closed, and having their side edges bent at an angle therefrom suflicient to present a broad edge parallel to each other and to the supporting-ring when the vertical sides of the jaws are closed tightly against each other, and the horizontal sides against the upper face of the supporting-ring, and hinges attached to the jaws at a point substantially central between their side edges for securing said jaws to said supporting-ring, so that the backward pressure of the water forces the side edges to each other and the horizontal sides backward against the upper face of the supporting-ring.

' JOSEPH NOLL.

Witnesses:

JAMES SANGSTER, JOHN ZOEPFEL. 

